Behavioral Report

Analysis

max time kernel
140s
max time network
132s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01-02-2023 06:34

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Report Files Registry Network Processes Mutex Misc

General

Target

MSVCR71.DLL.dll
Size

400KB
MD5

f90aa1c4d54dafde1b4359293eda3f52
SHA1

10d781593ec6c3ea1780d887d2ad73a296bc0b23
SHA256

7ea73b4aa5cc6aee461f0f0a961aa8a9ff16ed09a82d039ff1136e8c23c41820
SHA512

d3ce7b811cf778584a4ee590bbeb7693bdc43c8acccaa77a433eaea18e5f77066f59eb54890d2fe7d270b3493e8a8077236786d362bf8fea0ef3cfd1a537ad7f
SSDEEP

6144:ccV9z83OtqxnEYmt3NEnvfF+Tbmbw6An8FMciFMNrb3YgxxpbCAOxO2ElvlEzn:coz83OtIEzW+/m/AyF7bCrO/Ej

Score

10^/10

ramnit banker spyware stealer trojan upx worm

Malware Config

Signatures

Ramnit
Ramnit is a versatile family that holds viruses, worms, and Trojans.
trojan spyware stealer worm banker ramnit
Executes dropped EXE 2 IoCs

Processes:

rundll32Srv.exeDesktopLayer.exe

pid process

268 rundll32Srv.exe
796 DesktopLayer.exe

pid	process
268	rundll32Srv.exe
796	DesktopLayer.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/files/0x0008000000005c51-56.dat	upx
behavioral1/files/0x0008000000005c51-58.dat	upx
behavioral1/files/0x0008000000005c51-60.dat	upx
behavioral1/files/0x0009000000013a09-65.dat	upx
behavioral1/memory/268-64-0x0000000000400000-0x000000000042E000-memory.dmp	upx
behavioral1/files/0x0009000000013a09-61.dat	upx
behavioral1/files/0x0009000000013a09-67.dat	upx
behavioral1/memory/796-68-0x0000000000400000-0x000000000042E000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32Srv.exe

pid process

1108 rundll32.exe
268 rundll32Srv.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File created C:\Windows\SysWOW64\rundll32Srv.exe rundll32.exe

pid	process
1108	rundll32.exe
268	rundll32Srv.exe

description	ioc	process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

Drops file in Program Files directory 3 IoCs

Processes:

rundll32Srv.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Microsoft\px194C.tmp	rundll32Srv.exe
File created	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe
File opened for modification	C:\Program Files (x86)\Microsoft\DesktopLayer.exe	rundll32Srv.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1476 1108 WerFault.exe rundll32.exe

pid	pid_target	process	target process
1476	1108	WerFault.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 28 IoCs

adware spyware

TTPs:

Modify Registry

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{6F652931-A1FA-11ED-9FD0-D6EA6736E294} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "381998225"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

DesktopLayer.exe

pid process

796 DesktopLayer.exe
796 DesktopLayer.exe
796 DesktopLayer.exe
796 DesktopLayer.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1640 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1640 iexplore.exe
1640 iexplore.exe
1964 IEXPLORE.EXE
1964 IEXPLORE.EXE
1964 IEXPLORE.EXE
1964 IEXPLORE.EXE

pid	process
796	DesktopLayer.exe
796	DesktopLayer.exe
796	DesktopLayer.exe
796	DesktopLayer.exe

pid	process
1640	iexplore.exe

pid	process
1640	iexplore.exe
1640	iexplore.exe
1964	IEXPLORE.EXE
1964	IEXPLORE.EXE
1964	IEXPLORE.EXE
1964	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

rundll32.exerundll32.exerundll32Srv.exeDesktopLayer.exeiexplore.exe

description	pid	process	target process
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 828 wrote to memory of 1108	828	rundll32.exe	rundll32.exe
PID 1108 wrote to memory of 268	1108	rundll32.exe	rundll32Srv.exe
PID 1108 wrote to memory of 268	1108	rundll32.exe	rundll32Srv.exe
PID 1108 wrote to memory of 268	1108	rundll32.exe	rundll32Srv.exe
PID 1108 wrote to memory of 268	1108	rundll32.exe	rundll32Srv.exe
PID 1108 wrote to memory of 1476	1108	rundll32.exe	WerFault.exe
PID 1108 wrote to memory of 1476	1108	rundll32.exe	WerFault.exe
PID 1108 wrote to memory of 1476	1108	rundll32.exe	WerFault.exe
PID 1108 wrote to memory of 1476	1108	rundll32.exe	WerFault.exe
PID 268 wrote to memory of 796	268	rundll32Srv.exe	DesktopLayer.exe
PID 268 wrote to memory of 796	268	rundll32Srv.exe	DesktopLayer.exe
PID 268 wrote to memory of 796	268	rundll32Srv.exe	DesktopLayer.exe
PID 268 wrote to memory of 796	268	rundll32Srv.exe	DesktopLayer.exe
PID 796 wrote to memory of 1640	796	DesktopLayer.exe	iexplore.exe
PID 796 wrote to memory of 1640	796	DesktopLayer.exe	iexplore.exe
PID 796 wrote to memory of 1640	796	DesktopLayer.exe	iexplore.exe
PID 796 wrote to memory of 1640	796	DesktopLayer.exe	iexplore.exe
PID 1640 wrote to memory of 1964	1640	iexplore.exe	IEXPLORE.EXE
PID 1640 wrote to memory of 1964	1640	iexplore.exe	IEXPLORE.EXE
PID 1640 wrote to memory of 1964	1640	iexplore.exe	IEXPLORE.EXE
PID 1640 wrote to memory of 1964	1640	iexplore.exe	IEXPLORE.EXE

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\MSVCR71.DLL.dll,#1

Suspicious use of WriteProcessMemory

PID:828

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\MSVCR71.DLL.dll,#1

Loads dropped DLL
Drops file in System32 directory
Suspicious use of WriteProcessMemory

PID:1108

C:\Windows\SysWOW64\rundll32Srv.exe

C:\Windows\SysWOW64\rundll32Srv.exe

Executes dropped EXE
Loads dropped DLL
Drops file in Program Files directory
Suspicious use of WriteProcessMemory

PID:268

C:\Program Files (x86)\Microsoft\DesktopLayer.exe

"C:\Program Files (x86)\Microsoft\DesktopLayer.exe"

Executes dropped EXE
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory

PID:796

C:\Program Files\Internet Explorer\iexplore.exe

"C:\Program Files\Internet Explorer\iexplore.exe"

Modifies Internet Explorer settings
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory

PID:1640

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE

"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1640 CREDAT:275457 /prefetch:2

Modifies Internet Explorer settings
Suspicious use of SetWindowsHookEx

PID:1964

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1108 -s 228

Program crash

PID:1476

Network

MITRE ATT&CK Matrix

Collection

Command and Control

Credential Access

Defense Evasion

Modify Registry

T1112

Discovery

Execution

Exfiltration

Impact

Initial Access

Lateral Movement

Persistence

Privilege Escalation

Replay Monitor

00:00 00:00

Downloads

C:\Program Files (x86)\Microsoft\DesktopLayer.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
C:\Program Files (x86)\Microsoft\DesktopLayer.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\5C1W01OP.txt
Filesize
608B

MD5
a1ccf64a4fdd08d0fe5535d089004968

SHA1
d1c85c747bc71c3bd4aa516bd486fbb708fa2d14

SHA256
ed7cd01061c00ceeef29dcd361a2d9f8fff9319057be34c21941abb019284a49

SHA512
1818c8d50384354071ee4c16e325492c0ef656a6b726fb720267bea52c42324fbd60eb7423d255201182373c51608fecc3b1000513ca02b2359dfad1c01aa49c

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
C:\Windows\SysWOW64\rundll32Srv.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
\Program Files (x86)\Microsoft\DesktopLayer.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
\Windows\SysWOW64\rundll32Srv.exe
Filesize
55KB

MD5
ff5e1f27193ce51eec318714ef038bef

SHA1
b4fa74a6f4dab3a7ba702b6c8c129f889db32ca6

SHA256
fd6c69c345f1e32924f0a5bb7393e191b393a78d58e2c6413b03ced7482f2320

SHA512
c9d654ead35f40eea484a3dc5b5d0a44294b9e7b41a9bacdafdd463d3de9daa2a43237a5f113f6a9c8ea5e1366823fd3d83da18cd8197aa69a55e9f345512a7a

Download Submit
memory/268-57-0x0000000000000000-mapping.dmp

Download
memory/268-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/796-63-0x0000000000000000-mapping.dmp

Download
memory/796-68-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1108-54-0x0000000000000000-mapping.dmp

Download
memory/1108-69-0x000000007C340000-0x000000007C3A5000-memory.dmp

Filesize
404KB

Download
memory/1108-70-0x0000000000660000-0x000000000068E000-memory.dmp

Filesize
184KB

Download
memory/1108-71-0x0000000000660000-0x000000000068E000-memory.dmp

Filesize
184KB

Download
memory/1108-55-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

Filesize
8KB

Download
memory/1476-62-0x0000000000000000-mapping.dmp

Download